Identity
Unique IDELEMENT_GLOBAL.2.159554
Element CodePDHYD0C4V0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderSolanales
FamilyHydrophyllaceae
GenusPhacelia
Other Common NamesMono Phacelia (EN) Mono phacelia (EN)
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Taxonomic CommentsThe Intermountain Flora (Cronquist et al. 1984) synonymizes this taxon within the varieties of Phacelia lutea; Kartesz (1999) accepts it as a valid species.
Conservation Status
Rank MethodLegacy Rank calculation - Biotics v1
Review Date2019-04-16
Change Date1997-03-18
Edition Date2019-04-16
Edition AuthorsJ. Morefield (NVHP) (1999), rev. Treher (2019)
Threat ImpactHigh - medium
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank ReasonsPhacelia monoensis occurs in the western reaches of the Basin and Range in California and Nevada. There are 17 occurrences in Nevada and 12 potentially extant occurrences in California. Most occurrences are historic and need to be surveyed for up to date information. The species benefits from moderate amounts of disturbance. Most occurrences are roadside: the roads the plants are found along were mostly built for the purposes of mineral exploration, so future mineral extraction or very aggressive road maintenance may threaten the species.This makes the long term stability of many of the current sites somewhat tenuous. Low seed production is reported as an issue at some sites.
Range Extent CommentsPhacelia monoensis occurs in the western reaches of the Basin and Range in California and Nevada.The southernmost occurrence is near Coso Peak in California and the northernmost is west of Carson City, Nevada.
Occurrences CommentsThis species is known from 17 occurrences in Nevada and 12-14 in California. Most occurrences are historic, not surveyed for 20 or more years.
Threat Impact CommentsSome threats to the species include road construction and maintenance, mineral exploration, and development. While the species is rare but it responds well to disturbance: some of the largest populations are found along road cuts through its habitat.This may have aided in dispersal and establishment of new populations. However, care should be taken to avoid disturbances intensive or extensive enough to cause permanent impacts (J. Morefield, pers. comm., 2019). The species is also threatened by cattle and sheep grazing at some sites, not only is trampling an issue but nutrients from their dung enhances soil nutrients which creates favorable conditions for invasive species.